18472639305 has 32 divisors (see below), whose sum is σ = 30089232000. Its totient is φ = 9675894272.

The previous prime is 18472639291. The next prime is 18472639307. The reversal of 18472639305 is 50393627481.

It is a cyclic number.

It is not a de Polignac number, because 18472639305 - 2⁷ = 18472639177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18472639307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152482 + ... + 245348.

It is an arithmetic number, because the mean of its divisors is an integer number (940288500).

It is a 2-persistent number, because it is pandigital, and so is 2⋅18472639305 = 36945278610, but 3⋅18472639305 = 55417917915 is not.

Almost surely, 2^18472639305 is an apocalyptic number.

18472639305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18472639305 is a deficient number, since it is larger than the sum of its proper divisors (11616592695).

18472639305 is a wasteful number, since it uses less digits than its factorization.

18472639305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93113.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 18472639305 in words is "eighteen billion, four hundred seventy-two million, six hundred thirty-nine thousand, three hundred five".